MDARD Michigan Core Pesticide Applicator Practice Exam

True or False: Pesticides with high water solubility have a greater potential for contamination.

1. True

2. False

3. Only if applied in large quantities

4. Depends on the soil type

The correct answer is: True

Pesticides that are highly soluble in water can indeed pose a greater risk for contamination. This is due to their ability to easily dissolve and move through water, which can lead to runoff into nearby waterways or groundwater systems. When such pesticides are applied to areas in close proximity to bodies of water, or even on soils that are already saturated with moisture, they can quickly be carried away by water movement, increasing the likelihood of environmental contamination. Moreover, high water solubility can also affect how pesticides interact with the soil. When these compounds dissolve, they may not adhere effectively to soil particles, making them more mobile. As a result, they can leach into groundwater or be transported by surface runoff during rainfall or irrigation events. In contrast, pesticides that are less soluble in water are typically more prone to remaining in the application area or binding to soil particles, reducing their potential for widespread contamination. Therefore, the statement regarding the contamination potential of highly water-soluble pesticides being substantial is consistent with environmental science principles.